LinkedIn Queens answer for Friday, September 11: #864

Queens solution, step by step

Each LinkedIn Queens step places one queen and closes its row, its column, its region and the squares touching it.

1. Step 1: The Blue region sits entirely in row 7, so no other queen can go in row 7. The Green region sits entirely in row 8, so no other queen can go in row 8. The Yellow region sits entirely in row 9, so no other queen can go in row 9. The Red region has only one open square left, so its queen goes in row 6, column 1 (R6C1).
2. Step 2: The Pink region sits entirely in column 8, so no other queen can go in column 8. The Orange and Green regions sit entirely in columns 6 and 7, so no other queen can go in those columns. The Yellow region has only one open square left, so its queen goes in row 9, column 5 (R9C5).
3. Step 3: The Green region has only one open square left, so its queen goes in row 8, column 7 (R8C7).
4. Step 4: The Orange region has only one open square left, so its queen goes in row 4, column 6 (R4C6).
5. Step 5: The Pink region has only one open square left, so its queen goes in row 5, column 8 (R5C8).
6. Step 6: The Teal region sits entirely in column 4, so no other queen can go in column 4. The Blue region has only one open square left, so its queen goes in row 7, column 3 (R7C3).
7. Step 7: The Purple region has only one open square left, so its queen goes in row 3, column 2 (R3C2).
8. Step 8: The Teal region has only one open square left, so its queen goes in row 2, column 4 (R2C4).
9. Step 9: The Gray region has only one open square left, so its queen goes in row 1, column 9 (R1C9).

Answer coordinates: R1C9, R2C4, R3C2, R4C6, R5C8, R6C1, R7C3, R8C7, R9C5